A 90% stenosis of the right coronary artery requires stenting. Clinically more than 75% stenosis is called severe stenosis. Patients with 90% stenosis of the right coronary artery may have obvious manifestations of angina such as chest tightness, chest pain, etc. Interventional treatments can be carried out by means of dilatation of the balloon, stent implantation, etc., and bypass grafting can also be considered if necessary. Patients with 90% stenosis of the right coronary artery need to initiate secondary prevention of coronary artery disease after surgery, such as oral aspirin and statins. Lifestyle interventions, such as smoking cessation, weight control, and a regular routine, should also be conducted at the same time. If the symptoms of chest tightness and chest pain are not relieved or are accompanied by other symptoms, the patient should go to the hospital in time to have the cause clarified and then be given targeted treatment.